Building & Construction

At DuPont, we're focused on dynamic science that generates real-world solutions. That's why DuPont is at the forefront of building science, with brands you depend on, like Tyvek®, SentryGlas®, Corian® solid surfaces, Zodiaq® quartz surfaces and Kevlar®.

Electronics

With a deep understanding of materials science, a commitment to technology leadership, a wide range of process expertise and a long history of innovation, DuPont offers the industry’s broadest array of high performance electronic materials.

Energy

With the world’s population projected to surpass 9 billion by 2050, now is the time to prepare for a secure energy future. We invite you to collaborate with our global teams to find science-driven, sustainable energy solutions.

Food & Beverage

At DuPont, we're putting science to work in the food and beverage industry — improving the nutritional value of food, ensuring food safety, and finding smart, sustainable solutions to feed a growing population.

Health Care & Medical

DuPont offers a broad range of healthcare products and high-performance materials that help create safer healthcare environments, contribute to innovations in medical devices and help protect the health of patients and healthcare providers worldwide.

Marine

Mining

Dupont Mining products and services help improve extraction, personal protection, safety and more. Processing and transporting of highly abrasive and corrosive, bitumen, slurry and tailings require the innovation and technology that DuPont can provide.

Safety & Protection

In the face of growing global industrialization, DuPont takes safety and protection seriously. Learn how DuPont continues to improve upon its materials and workplace safety performance to help keep all of us safe in the toughest conditions.

Industries Served

Learn about the many industries that DuPont serves in the United States.

For Terminals/Producers: Testing and Processing Asphalt Binder with Elvaloy® RET

Producing a higher-performing asphalt binder delivers value to contractors and project owners and is often a key requirement for today's more highly engineered paving projects.

Pre-Testing the Reaction

The reactive component of Elvaloy® RET terpolymer has a predictable rate of reaction with a given asphalt source. Pre-testing in a lab helps optimize processing conditions.

With Elvaloy® RET, asphalt modification occurs at a molecular level. Resulting properties are determined by additive level and the base asphalt. Often, it takes only a fraction as much Elvaloy®, compared with other modifiers, to achieve the highest possible PMA performance.

Design of Proper Mixing

DuPont™ Elvaloy® RET is a pelletized terpolymer that needs distributive and dispersive mixing design in order to faclitate reaction with available asphaltenes.

Because Elvaloy® RET is a reactive terpolymer, and because it is added in very low amounts to the asphalt, it is especially important to assure proper dispersion and distribution of the RET into the asphalt. A key requirement is well-designed mixing equipment with adequate power.

Producing PMA with RET

The chemical reaction of Elvaloy® RET terpolymer with asphalt takes place in a heated mixing tank with moderate stirring (no high-shear mill needed). When the reaction is done, the modified asphalt binder has permanently improved properties.

Modifying asphalt using Elvaloy® RET involves controlled feeding of the terpolymer (as free-flowing, meltable pellets) into a heated mixing tank. The product chemistry allows the RET (in melted form) to interlock with asphalt as the two ingredients flow together. Keeping the materials stirred gently, in a heated vessel, keeps the terpolymer locking itself into the asphalt, until the reaction is complete.